Electric-arc lamp.



PATBNTED OCT. 27, 1903.

J. MELZBR. ELECTRIC ARG LAMP.

APPLICATION FILED APR.10, 1901. No MODEL.

d3 de d3 B d6 d2 b1 l d4 d1 d* d DV s f D C@ A ee *ax- -`T c55; 3 .l k1- :2 C c D (I I.)El D2' CITl ce 1)2 D1 Dl D5 1 4 i3 1 2. n4 l r; H Nl .La H e@ 1 L. o

n i 1R. n

5 a 1 le .s E -1-- J WJTNESSES.- Fig ms News Pains co, PHQTQAJTHO. msuworon. n. c.

2 SHEETS-SHEET l.

j. M 94u43, /zVl/ENTUR.`

BY 715W A T TORNE Y.

No. 742,705. PATENTED 00T. 27, 1903.

J. MELZER. ELECTRIC ARG LAMP.

APPLICATION FILED APR. l0, 1901.

N0 IODEL.

2 SHEETS-SHEET 2.

ATTORNEY.

l No. 742,705.

Patented October 27, 1903.

JOSEPH MELZER, OF CLEVELAND, OHIO, ASSIGNOR TO THE OSBORN-MORGAN COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF NEW JERSEY.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 742,705, dated October 27, 1903. Application filed April 10. 1901. Serial No. 55,193. (No model.)

To all whom, it may concern:

Be it known that LJ OsEPH MEL'ZER, a citizen of Austria-Hungary, residing at Cleveland, in the county of Cuyahoga and State of Ohio,

have invented certain new and useful Improvements in Electric-Arc Lamps, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in electric-arc lamps, and it appertains to the features hereinafter set forth in the specification, illustrated in the accompanying drawings, and more especially pointed out in the annexed claims.

The object of my invention is to produce an arc-lamp that shall be economical of construction, have the fewest possible number of parts, and produce illumination at the high- 2o est efficiency. CoeXtensive with the features enumerated, also to provide the simplest operating mechanism, that lends itself to steadiness of arc and ease of trimming.

Vith these ends in view I illustrate in the z5 figures of the accompanying drawings such instances of adaptation as will show the fundamental principles of the invention without limiting myself to the specic construction instanced in the drawings.

Figure l is an elevation in vertical section. Fig. 2 is a'plan view inthe vicinity of the clutch. Fig. 3 is a plan view of the means shown in the drawings for removably securing the inner globe. Fig. 4 is a diagrammatic 3 5 representation of the circuit connections applicable to the instance of adaptation shown in the drawings. Fig. 5 is a perspective view of the carbon-cap. Fig. Gis an enlarged section of the magnet.

This form of lamp has the controlling-niagnet suspended from the supporting head, which is utilized in hanging up the lamp, to ceilings, dsc. and the casing is also supported by this head. The rheostat on low voltage circuits the steadying resistance is placed under a projection of the casing. When potentials, as two hundred and twenty volts, ttc., are used, the resistance is placed in a separate canopy, which may suspending-rod.

for fastening the inner globe are be a part of the usual The means unique in that they allow of a quick removal of the globe and a ready fastening thereof without any supporting means whatever being used at the bottom thereof.

Asupporting-head B carries an insulator l), from which the lamp is suspended. Itis held in a removable manner upon the magnet-head C by receiving a threaded bolt c, projecting therefrom. Thisprojectionhasformed there- 6o on an annular groove c', into which alockingscrew b/ sets, and thus prevents the lamp from receiving injury on account of accidental separation of the head from the magnet.

Upon the magnet-head C is placed an insulating-bushing e2, which insulates the casing-hood D from the projection c. The hood is flanged upwardly around c2, so as to receive and hold an insulating-washer d in position while the part-s are being assembled. The 7o head B clamps washer d between itself and the casing-hood D.

The usual protected lampterminals are placed on the casing-hood D, as follows, viz:

A boss or projection d is secured to the hood 75 for each terminal, a hole of some size is made therethrough, and insulating-bushings d2 are set therein on opposite sides thereof. A terminal cap d3, having 'an annular depending apron (Z4, is secured on the uppermost bush- 8o ing cl2 by means of a suitable screw d5, and terminal screws d are placed in the caps for holding the terminal wires.

A permeable head C, that has a slightlycounterbored cylindrical body c3 formed in- 85 tegral with the iiange portion c4, forms the magnet spool-head. The portion e3 passes about half-way through a non-permeable core-tube c5, andanon-permeable guide-tube cG projects from the counterbored end of c3. 9o This tube serves as an armature-guide. The lower magnet-head C' is similar to the head C. A short hub cT passes into the tube c5. A hole is formed in this hub somewhat larger than the armature to insure against the ac- 95 tual contact between these parts. As will be seen from the drawings, an open space is left between c3 and c7. This space is spanned by the armature C3. The guide-tube cG also projects into this space. made of highly-perme. ble material, the same as heads C and C' and their core projections The armature CS is Ioo therewith a binding-post 3 and the negative or lower carbon connection c3 and cl. A slot es is formed in the arinat ure, and a carbon and clutch tube E is threaded into the lower end of the armature. Any suitable non-magnetic material is secured to the upper face of the armature to prevent its sticking to the counterbored portion of the projection c3, or an ordinar 1 brass plug may be secured in for the same purpose.

A carbon and clutch tube E is slotted lengthwise thereof at e. This slot forms a guide for a carbon-cap F, which slips upon the upper end of a carbon f. It is also provided with a terminal screw that serves to hold one end of a flexible cable f, the other end of which is in circuit with the wire of the regulatingmagnet, that is wound upon the tube c5 between heads cl and C.

The casing-hood D is secured to a central or body portion D of the casing. This central portion extends above the joining-point at D2, so as to prevent the admission of rain, the., through Ventilating-holes D3. At the lower end of Dl a Haring apron Dl is formed, which joins onto D at Di". The extreme bottom end of D is fastened to a globe-centering ring` G by means of screws or pins. This ring Ghas a central web, and an opening is formed therein considerably larger than the carbontube E. A plate g, insulated from G,is secured thereon by screws, which are also suitably insulated. This plate serves to guide the carbon-tube E.

Rheostat-insulators H are secured under the casing-apron D'l by means of any suitable fastenings. Through these insulators a steadying resistance Zr is passed. The adjacent faces of the casin g are preferably covered with a lining of asbestos, so as to afford protection against the radiant heat of the rheostat.

The two rods fz' and t depend from ring G, so as to support a gas-cap Z2. The rod 'i is insulated from G and i2. It has connected at its upper end Z4, which passes through the bottom of the gas-cap Z2 and is insulated therefrom by a porcelain or any other heat-resisting insulator.

Secured to the gas-cap are two or more depending brackets J, which hold a split spring-ringj. This ring encircles the inner globe K under the flaring' head or rim Zt', and by means of screw-rod j and thumb-nut J2 it is opened or closed, thereby holding or loosening the inner globe7 as desired. Gascap Z2 has formed thereon a depending flange fil, which forms an inner wall of an annular groove i, in which a packing of asbestos is placed. This packing forms a cushion for the inner globe K. The flaring walls of the gas-cap serve as reiiecting-surfaees for heat and light. In the iioor or bottom is formed a hole through which the upper carbon loosely passes. Rod fr" is fastened to a boss orlug of cap at its'lower end and at its upper end to the ring G. It is not necessary that these fastenings should be insulated. The bottom of gas-cap i2 also serves to trip the carbonclutch when it is necessary to feed the upper carbon. At the lower end of carbon-tube E the clutch is fastened. This consists of a weighted lever Z, pivoted at Z to a depending bracket Z2, which is secured to the plate l.. The leverZ has formed therein a hole through which the carbonf passes. A spring Zserves to overcome any tendency toward vibration of the lever Z by placing' pressure upon the weighted end thereof. This lever has alower projection Z", which strikes the floor of the gas-cap when it is necessary to feed the carbon.

An arc-striking limit-stop is found by fastening a threaded rod L upon clutch-plate L. This rod extends upward through ring G and plate g, and check-nuts L? are placed thereon. The lower one is insulated on the face which comes into contact with plate g. This one limits the length of the are, and the upper one is a safety limit to the downward movement of the clutch, carbon-tube, and armature.

The lower carbon M is held in place by means Aof the negative connection li" through an annular ring il, fastened thereon, and a set-screw sholds the carbon in position. The inner globe K is only open at its upper end. The outer globe N has the usual curved [lange at the top, through which set-screws n, hold this globe to the globe-ring N. The globering is held under the casing by pivoted hooks N2, which snap over catches 1V, that are secured to the casing. Any suitable chain may be fastened to the casing and globe-ring upon which to suspend the unhooked globe and ring while the lamp is being trimmed.

The circuit connections are shown more especially in Fig. Ll. They are as follows, viz: The current enters at and passes to the magnet, thence via flexible cable to the carbon-cap, thence along' the upper carbon across the arc to the negative carbon and via binding-post and intermediate rods to the rheostat and from thence to the negative terminal.

lVhat I claim is j l. In an electric-arc lamp, the combination of permeable magnet-heads one havin g a permeable core projection, and a movable armature passing through the other head and. into a recess in said projection, and a non-permeable core-tube on the outside of said projection and connected to the other head, substantially as set forth.

2. In an electric-arc lamp, a controllingmagnet comprising thc combination of a hollow non-permeable core-tube and permeable magnet-heads, one of said heads having a pei'- meable core projection formed thereon within said tube, substantially as set forth.

3. In an electric are lamp, a controlling` magnet comprising in combination permeable heads and a permeable core projection on one of said heads, with a movable armature adapt- IIO ed to pass into the magnet through the other of said heads, and a non-permeable core-tube on the outside of said projection and secured to the last-mentioned head, substantially as set forth.

4L. In an electric-arc lamp, in combination, a controllingmagnet comprising a hollow winding, apairoi heads therefor, a permeable core extension to one of said heads extending into said winding, a non -permeable guide carried by said core extension, a non-permeable core-tube passing around said extension and secured to the other head, and a movable permeable armature passing through a hole in the last-mentioned head and adapted to engage said guide, substantially as set forth.

5. In an electric-arc lamp, a controllingmagnet comprising a hollow winding, a pair of permeable heads, a permeable core projection on one of said heads extending into the hollow winding, there being a large space of high magnetic reluctance between the face of said projection and the other head, such latter headhaving an opening through it, in combination with a non-permeable guide within the hollow of the winding, and a movable permeable armature adapted to stand in said opening while in the control of said guide, substantially as set forth.

G. In electric-arc lamps, in combination, a bottom ring having a web, a carbon-tube passing therethrough, said carbon-tube having a longitudinal slot, a carbon-cap guided thereby, a clutch secured to the lower extremity of said carbon-tube, a rod secured to said clutch, and passing through said web, said web having an opening therefor, and adjustable stops carried by said rod on either side of said web, substantially as described.

7. In electric-arc lamps, in combination, a body, an apron thereabout, a rheostat carried beneath said apron, a globe, and members passing around said apron and adapted to support said globe from said body, substantially as described.

8. In electric-arc lamps, a controlling-inagnet, a clutch, an armature-supported carbontube extending from the magnet to the clutch, in combination with limit-stops adjustable with respect to each other placed upon said clutch whereby the armature movement is controlled within predetermined limits in either direction, substantially as set Jforth.

9. In electric-arc lamps, in combination, a gas-cap having an upwardly-daring rim, a globe-ring having a groove, and a transverse web which combines with said flaring rim to form a basin, said web having a hole through which a carbon may pass, insulated supports for said gas-cap, a globe-holding iiXture depending from said cap, and a negative terminal insulated from said cap and adapted to support a carbon, substantially as described.

10. In electric-arc lamps, in combination, a body, an apron projecting outwardly therefrom, rheostats carried beneath said apron, a globe-rin g beneath said body, members which reach around said apron and which support said globe -ring, and means for supporting said globe-ring by said body, substantially as described.

ll. In an electric-arc lamp, in combination, a casing-hood, a controlling-magnet carried beneath the same, a projection carried by said magnet and passing upwardly through the top of said casing-hood, a head by which said lamp is adapted to be supported, and a swivel connection between said head and said projection, substantially as described.

l2. In an electric-arc lamp, in combination, a casing-hood, a controlling-magnet carried just beneath the top thereof, a head above said hood, a swivel connection between said hood and head, an armature cooperating with said controlling-magnet, a carbon-tube carried thereby, and a clutch carried by said carbon-tube, substantially as described.

13. In an electric-arc lamp, in combination, a hood, a controlling-magnet beneath said hood, a head above said hood, a swivel connection between said head and hood, means for insulating said head and hood, and an insulator carried by said head and adapted to form a suspension-point for said lamp, substantially as set forth.

In testimony whereof I afiix my signature in presence oi' two witnesses.

JOSEPH MELZER.

Titnessesz E. S. HoUGH, N. S. AMs'rUTZ. 

